Energy efficient motors use less electricity, run cooler, and often last longer than NEMA (National Electrical Manufacturers Association) B motors of the same size.This presentation is on ' ENERGY EFFICIENT INDUCTION MOTOR ' which is mostly use in industries.

1. ENERGY EFFICIENT INDUCTION MOTORS
Presented By :
Kevin Patel
17BEE060
Electrical-2017 Batch
Divison-2

2. contents
 Introduction
 Energy efficient motor
 Specification of EEM (energy efficient motor)
 Motor losses & reduction method
 Benefits of implementing EEM
 Experimental setup
 Operating & performance characteristic
 EEM in Indian scenario
 Advantages
 Application
 Conclusion
 References

3. Introduction
 A large fraction of electrical energy consumed in many
facilities is used to run electric motors. Nationally,
motor driven systems account for about 57% of all
electrical energy use.
 The electric motor manufacturers are seeking methods
for improving the motor efficiencies, which resulted in
a new generation of electric motors that are known as
energy efficient motors.
 This paper deals with energy conservation by installing
energy efficient motor (EEM) instead of standard
efficiency motor.

4. Energy efficient motors
 It produces same shaft output power but uses less
electrical input power than a standard efficiency
motor.
 Standard motor generally competes on price, not
efficiency, but EEM competes on efficiency, not price.
 In Energy efficient motors Both single phase and three-
phase motors are easily available.
 EEM are higher quality motors with longer warranty
and life span (about 20 years)

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EEM specifications
 to make it much easier for purchasers to identify energy
efficient motors on the market.
 motor efficiency classification labels – Eff1, Eff2 & Eff3..

6. Motor losses & reduction
Techniques

8.  Core loss represents energy required to magnetize the core
material (hysteresis) and includes losses due to creation of
eddy currents that flow in the core.
 Windage and friction losses occur due to bearing friction and
air resistance.
 Stator losses appear as heating due to current flow (I) through
the resistance (R) of the stator winding. This is commonly
referred to as an I2R loss.
 Rotor losses appear as I2R heating in the rotor winding.
 Stray load losses are the result of leakage fluxes induced by
load currents.
Motor losses

9. High efficiency motor design
 Improved steel:
 Thinner laminations:
 Increasing conductor's volume:
 Modified slot design:
 Narrowing air gap:
 Improved rotor insulation:
 More efficient fan design:

10. Benefits of implementing eem systems
 Electricity savings potential
 Environmental benefits
 Micro economical benefits
 Macro economical benefits

11. Different tests for analysing the performance
 a) Temperature test: The motor is loaded and
allowed to run until its temperature stabilizes.
The temperature and winding resistances are
recorded.
 b) Load test: The motor is loaded at six different
loading points ranging from 25%-150% of rated
load. The stator and rotor copper losses are
calculated from this.

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c) No-load test: The motor is run at no-load with a
varying supply. The friction & windage and core
losses are calculated voltage between 125% to 20%
of rated voltage from this.
Different tests for analysing the performance

13. Operating andperformance characteristics of sm&
eem

14. Operating andperformance characteristics of sm&
eem

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Constructional features of eeM
 rotor design
- One major consideration in the design of high efficiency
induction motors is to reduce rotor resistance.
-efficiency can be achieved by substituting Aluminum
with copper.

16. Energy Efficient Machine Design by Proper
Selection of Core Material
 core loss in a machine is around 30~ 50% of the
total losses.
 reduction of core material thickness and stress
relief annealing of the core improved machine
efficiency .

17. Efficiency Improvement by Inserting of
Superconducting Materials
 High temperature superconductors (HTS), which offered the
advantage of cooling via liquid nitrogen instead of liquid
helium.
 complete elimination of refrigerator power consumption
would only show an improvement in machine efficiency of
~0.02% for a 300 MVA rating.
 Of more importance than the efficiency
 improvement is that use of a liquid nitrogen ambient would
lead to reduced capital costs for the refrigeration plant and
reduce the complexity of the cryogenic design.

18. Rotor with two end rings

19. Power factor improvement in IM
 Installing external capacitor
 Avoid operation of equipment above its
rated speed
 Replacement of SM with EEM.

20. How energy efficient motor differ from standard
motor ???...
 Higher quality and thinner steel laminations in the stator
 More copper in the windings
 Smaller air gap between the rotor and stator
 Reduced fan losses
 Closer machining tolerances
 Generally, they cost 15 to 30 percent more than standard motors,
depending on the specific motor, manufacturer, and market
competition

21. Eem recognition in Indian scenario
 Siemens India awarded prestigious “BEE
Star” rating for their energy-efficient motors
Siemens motors help
customers minimize their
energy consumption
in production, thus
significantly reducing their
operating costs and the cost
of ownership and bringing
about a significant boost to
productivity.

22. Advantages:
 The EEM has a greater efficiency than a standard motors; therefore
they have less operating costs.
 EEM has a lower slip so they have a higher speed than standard
motors.
 EEM can reduce maintenance costs and improve operations in industry due
to robustness and reliability.
 Increasing the productivity.
Disadvantages:
1) Speed Control
2) Portability
3) Initial cost is more. It is about 15% to 30% more than the normal motors.

23. Applications
• Motors are suitable for wide industrial applications like paper,
cement, textiles, cranes, material handling, machine tools
and blowers etc.
Conclusion
• most of the industrial loads having motors are consuming
70% of the total electricity.so it is better to replace standard
motors with energy efficient motors where ever economical.
so that we can
Save energy.
Save money.
Save atmosphere from pollution.

24. References
[1] “Understanding Energy Efficiency Motors”, Electrical Apparatus
Service Association (EASA), pp. 12-14.
[2] D.G. Walters, I.J. Williams, D.C. Jackson, B. Hansen “The case for
a new generation of high efficiency motors – Some problems and
solutions”, Electrical Machines and Drives,11-13 Sept. 1995,
Conference Publication No. 412, IEE 1995.
[3] "Understanding high efficiency motors," Published by copper
development centre, 2001
[4] J. Andreas, Energy Efficient Electric Motors: Selection and
Application, Marcel Deker, 1992.

25. Thank you…